Article
Biochemistry & Molecular Biology
Chaoke Bulin
Summary: The magnetic architecture incorporating graphene-chitosan has shown promising potential in wastewater purification. In this study, a Fe3O4-graphene oxide-chitosan (MGOCS) ternary hybrid was fabricated and used as an adsorbent for the removal of aqueous Zn(II) ions. The adsorption mechanism was investigated based on the hard and soft acid base (HSAB) theory, and the results showed that MGOCS was able to remove 96.73% of Zn(II) ions within 38 minutes, with an adsorption quantity of 386.92 mg•g(-1). Spectroscopic analyses supported the proposed adsorption mechanism, suggesting the potential for the development of efficient adsorbents based on magnetic graphene-chitosan for wastewater remediation.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Materials Science, Multidisciplinary
Wei Yang, Mingli Cao
Summary: In this study, carboxylated graphene oxide (GO-COOH) was synthesized and its adsorption performance for copper and lead ions was investigated. The results showed that the adsorption capacity of GO was significantly enhanced after carboxylation treatment.
DIAMOND AND RELATED MATERIALS
(2022)
Review
Engineering, Environmental
Abul K. Mallik, S. M. Fijul Kabir, Fahim Bin Abdur Rahman, Mohammad Nazmus Sakib, Shakil Shahriar Efty, Mohammed Mizanur Rahman
Summary: This review systematically analyzes the recent progress of chitosan-based adsorbents for removing Cu(II) ions from wastewater, including the types of adsorbents, adsorption mechanisms, isotherms, and kinetics. The study shows that chitosan-based adsorbents have high potential for reusability and are most effective in slightly acidic to neutral aqueous mediums. The binding of Cu(II) ions by these adsorbents is mainly governed by complexation, electrostatic interaction, ion-exchange, and surface precipitation mechanisms.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Engineering, Environmental
Dan Ma, E. Tao, Shuyi Yang
Summary: The GO-TiO2/SA composite beads, prepared through blending and cross-linking process, exhibit superior adsorption performance with a more integral porous structure and larger specific surface area compared to GO/SA composite beads. The adsorption behavior of Cu(II) can be better described by the pseudo-second-order kinetic model and Langmuir model, highlighting the efficiency of the composite beads as an adsorbent. Additionally, the composite beads maintain their undamaged structure and larger pore sizes after two cycles of adsorption-desorption.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Biochemistry & Molecular Biology
Zhiying Shao, Jilai Lu, Jian Ding, Fengjiao Fan, Xinyang Sun, Peng Li, Yong Fang, Qiuhui Hu
Summary: The synthesized chitosan-pectin gel beads showed excellent adsorption performance for removing heavy metals from water. With good structural characteristics, mechanical strength, and stability, CPBs were found to have great reusability and potential for environmental protection and reuse.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Article
Environmental Sciences
Fang Wang, Jiyun Gao, Lijuan Jia, Shixing Wang, Ping Ning
Summary: In this study, a functionalized chitosan-based adsorbent was synthesized and shown to have strong adsorption capability for copper ions, indicating its practical significance for removing heavy metal copper in wastewater.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Polymer Science
Chao Hu, Zuhong Zheng, Mengyao Huang, Fan Yang, Xuewei Wu, Aiqun Zhang
Summary: This study analyzed a magnetite-chitosan composite through various techniques and explored its adsorption properties for Cu(II) and Cd(II). The results showed that the optimum pH for adsorption was 5.0, the equilibrium time was about 10 minutes, and the adsorption capacity reached 26.28 mg/g for Cu(II) and 18.67 mg/g for Cd(II). The temperature had a certain impact on the adsorption amount, and the composite material had a relatively rough outer surface, with dominant adsorption being attributed to chitosan. The research suggests the importance of further optimizing the composite system through green synthesis for heavy metal adsorption.
Article
Biochemistry & Molecular Biology
Xiaoqi Liu, Yanyun Zhang, Yan Liu, Ting'an Zhang
Summary: In this study, chitosan bead grafted by third-generation dendrimers (CB-G3) with a diameter of 1.40 mm was synthesized and found to have excellent performance in recovering Ag(I), Cu(II), and Pb(II) ions in aqueous media. The optimum pH value was found to be 5, and the increased generation number of dendrimers contributed to an improvement in adsorption capacity. The adsorption processes can be described using pseudo-second-order kinetic and Langmuir models, and electrostatic interactions and hydrogen bonds are the main mechanisms between metal ions and N atoms.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Engineering, Environmental
Cheng Ji, Shuyi Yang, E. Tao, Ying Cheng, Xin Hao, You Li
Summary: The study prepared a three-dimensional network graphene oxide/sodium alginate aerogel beads (GSC) with a slit-shaped structure through cross-linking and freeze-drying methods, demonstrating excellent adsorption capacity and reusability for Cu(II). The pH was identified as the main factor affecting the adsorption performance of GSC.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Engineering, Environmental
Xiaoyi Tang, Siyi Wang, Zhihui Zhang, Zijie Li, Lin Wang, Liyong Yuan, Bairong Wang, Jian Sun, Lirong Zheng, Hongqing Wang, Weiqun Shi
Summary: In this study, a composite hydrogel/aerogel was prepared by inducing the self-assembly of chitosan and graphene oxide and growing potassium copper hexacyanoferrate(II) nanoparticles onto the surface. The composite hydrogel showed high sorption capacity and ultrafast kinetics for Cs+ removal. The system also demonstrated potential for the cleanup of Cs+ from contaminated groundwater using a fixed-bed column.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Environmental
Elham Cheraghipour, Mahmoud Pakshir
Summary: SPION-CA-CH is a potential magnetic nano-adsorbent with high adsorption capacity, reusability, and specific absorption rate for magnetic nano fluid hyperthermia (MNFH), making it suitable for applications in wastewater treatment and medical treatments.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Engineering, Environmental
Hang Yin, Qiuqiu Xiong, Miao Zhang, Bowen Wang, Fenge Zhang
Summary: In this study, magnetic composite microspheres (SCFP) were successfully prepared and used for the removal of Cu(II) from water. Batch experiments revealed that SCFP exhibited excellent adsorption capacity with a removal rate of 97.1% for Cu(II). Comprehensive analysis of the structure and adsorption mechanism of SCFP provided insights into its superior performance. These findings suggest the potential of SCFP for the removal of Cu(II) from water.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Nazrul Hsan, Pradip K. Dutta, Santosh Kumar, Joonseok Koh
Summary: This study investigates the performance of chitosan-graphene oxide and arginine-based aerogels as CO2 capture and fixation materials. The results show that these materials have a higher CO2 capture capacity compared to pure chitosan.
JOURNAL OF CO2 UTILIZATION
(2022)
Article
Multidisciplinary Sciences
Shujie Zhang, Yating Zhang, Lisong Fu, Mengke Jing
Summary: The study focused on the efficiency of using shell cellulose in water treatment environment to remove Cr (VI) and Cu (II) ions, finding that shell trichlorocellulose has better permeability to copper ions, better metal ion absorption properties, and relatively low cost. Additionally, chitosan fibers adsorbed more copper ions compared to chromium ions, mainly due to the good chelation between amino groups in chitosan fibers and copper ions.
SCIENTIFIC REPORTS
(2021)
Article
Engineering, Chemical
Qinyu Wang, Lipin Li, Lingchao Kong, Guiyuan Cai, Pu Wang, Jun Zhang, Wei Zuo, Yu Tian
Summary: An elastic polyethyleneimine-modified carboxymethyl chitosan aerogel was developed for the adsorption of Cu(II) in water, showing excellent adsorption performance and selectivity. The aerogel also demonstrated effective purification of industrial wastewater in a fixed-bed column filtration system. The strong electrostatic force, Vander Waals' force, and coordination of functional groups were found to contribute to the exceptional adsorption performance.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
